20380049 has 2 divisors, whose sum is σ = 20380050. Its totient is φ = 20380048.

The previous prime is 20380043. The next prime is 20380079. The reversal of 20380049 is 94008302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19298449 + 1081600 = 4393^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 20380049 - 2⁴ = 20380033 is a prime.

It is not a weakly prime, because it can be changed into another prime (20380043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190024 + 10190025.

It is an arithmetic number, because the mean of its divisors is an integer number (10190025).

Almost surely, 2^20380049 is an apocalyptic number.

It is an amenable number.

20380049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20380049 is an equidigital number, since it uses as much as digits as its factorization.

20380049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20380049 is about 4514.4267631672. The cubic root of 20380049 is about 273.1503373904.

The spelling of 20380049 in words is "twenty million, three hundred eighty thousand, forty-nine".